Locomotive fire box



Apr. 3, 1923.

LE GRAND PARISH LOGOMOTIVE FIRE BOX 2 sheets-sheet 1 Original Filed June 4, 1919 2/ A TTORNEYS.

Apr. 3, 1923.

LE GRAND PARISH LOCOMOTIVE FIRE BOX Original'Filed June 4, 1919 2 sheets-sheet 2 ATTORNEYS.

' Patented Apr. 3, 1923.

UNETE Ti:-

LE GRAND PARISH, OF MOUNTAINVIEW, NEW JERSEY.

LOCOMOTIVE FIRE BOX.

Original application filed June 4, 1919, Serial No. 301,785.

Serial No. 523,254.

To all whom it may concern Be it known that 1, Ln GRAND PARISH, a citizen of the United States, residing at Mountainview, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Locomotive Fire Boxes, of which the following is a specification.

This invention relates to locomotive fire boxes, especially of the shallow throat type, and has particular reference to an improved and novel arrangement of circulation tubes andrefractory arches carried thereby. It is a division of my copending application Serial No. 801,785, filed June 4, 1919. (Pat.

No. 1,403,816, issued January 17, 1922.)

In connection with the application mentioned, one of the primary objects was to increase the circulation and therefore, the efficiency of a boiler of the locomotive type by employing a large number of circulation tubes which were arranged in a manner to enable a workman to have ready access to the flues, and the present application has particular reference to an improved arrange ment of arches to be used in connection with the tubes and also to the provision of a special spacer brick therefor.

Another object of the invention resides in the provision of an improved arrangement of circulation tubes of the character specified, whereby a plurality of refractory arches may be supported thereon in a manner to promote better combustion by securin an intimate admixture of the gases.

till another object of my invention resides in an improved arrangement for supporting the arches carried by the circulating tubes.

The foregoing, together with such other objects as may hereinafter appear, or are incident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings, wherein:

Fig. l is a longitudinal section through a locomotive fire box embodying my improve ments; Fig. 2 is a cross section through the fire box illustrating the refractory arches in end elevation; Fig. 3 is a section taken on the line 33 of Fig. 1; Fig. 4 is a section taken on the line 44 of Fig. 1; and Fig. 5 is a perspective view of a novel form of spacer brick which I employ in supporting the arch away from the throat sheet.

Divided and this application filed December Referring now to Fig. 1, the fire box comprises inside and outside throat sheets 7 and 8; inside and outside side sheets 9 and 10; inside and outside back sheets 11 and 12; aflue sheet 13; a crown sheet 14; and atop sheet 15. The front and rear water legs are connected by a plurality of rearwardly and upwardly extending circulation tubes 16, arranged in two rows A and B, there being four tubes in the lower row A, and three tubes in the upper row B. The tubes are arranged in staggered relation and at their forward ends they are expanded in the inside throat sheet in approximately the same plane (see Figs. 1, 2 and 4:). In order to increase the vertical distance between the rows of tubes for a purpose which will appear, I spread the rows apart preferably by giving the upper row of tubes an upward bend, the bend extending approximately half the length of the tubes. Because of this arrangement of the tubes of the upper row, I construct the inside throat sheet with offset portions or jogs 17 which present a securing wall extending substantially at right angles to the end portions of the upper row of tubes. One such oi'f-set portion is provided for each of the upper tubes.

Supported on the upper row of tubes B is a refractory arch C composed of two rows of arch bricks 18, which may be of any pre ferred construction. Supported between the side sheets and the outer tubes of the lower row A are side arches composed of a plurality of side or wing bricks 19. Two rows of arch bricks 20 are supported on the outer pairs of tubes of the lower row, the space between the center tubes of the lower row being left open so that a workman may gain access to the fines, without removing any portion of the arches, by taking either of the courses indicated by the arrows in Fig. 8. The rows of tubes are spaced sufiiciently far apart by the arrangement previously described to permit of the foregoing.

The staggered arrangement of the tubes is also of importance in this respect for the reason that it brings the end tubes of the upper row of bricks in toward the center, increasing the distance between the 1 outer tubes and the side sheets.

The peculiar arrangement of the tubes permits of the use of a special triangularly disposed relation of the three arches as a result of. which the gases are thoroughly ad; 110

mixed and better combustion promoted whereby efficient operation of the boiler is insured and economical consumption of fuel had.

It will be observed that the construction of the upper tubes such as to require additional means for supporting the arch carried thereon and to this end I provide the special brick illustrated in F 4- and 5, particularly. In the lower face of these bricks D, I provide a semi-circular groove 21 adapted to lit the lower circulation tubes 16. The end tacos 22 of the bricks are adapted to abut the tubes ot the upper row, the length of the b icks being sufficient to permit of their insertion between pairs of tubes of the upper .row. The bricks are also provided with an in clined surface 23 against which the lower or front course of the upper row of bricks is adapted to abut; and with an inclined. surface 24; against which the forward or front bricks of the rows of bricks 20 are also adapted to abut. At the front the bricks are provided with a nose 25 adapted to bear against the inside throat sheet 7. By virtue of their construction the bricks D are securely locked in position between the tubes and are held against vertical displacement by reason of the weight of the arches.

I claim:

1. In a locomotive fire box the combination of a plurality of circulation tubes arranged in two rows spaced apart, with the tubes of one row in staggered relation with the tubes of the other row. an arch supported on the upper row with a. space between the same and a side sheet of the box. and an arch supported on the lower tubes, comprising wing bricks and center bricks, said arch having an open portion intermediate its sides.

2. In a locomotive fire box having side sheets, the combination of a lower row of tour circulation tubes, an upper row of three tubes sta ered with respect to the tubes of the hr row, an arch supported on the upper tubes consisting of two rows of bricks. wing bricks supported between the side sheets and the outer or end tubes ot the lower row, and a row of bricks supported on each outer pair of tubes of said lower row.

in a locon'iotive fire box. the combination ot a plurality of circulation tubes arranged in two rows, the tubes of one row beingstaggered with relation to the tubes of the other row, arches supported on said rows, and spacer bricks each having a groove or socket in the bottom face adapted to fit a tube of the lower row, the said bricks fitting between tubes of the upper row, and having an end bearing against a wall of the fire box. the arches being adapted to abut against the opposite end.

4-. In locomotive fire box provided with circulation tubes arranged in different planes. the combination of an arch supported on said tubes and a brick at the forward edge of said arch adapted to rest upon a tube in a lower plane, said brick being constructed to engage a tube in an upper plane at each side thereof. the arch at its rear end and the forward wall of the fire box at its forward end.

5. In a locomotive fire box, the combination of a plurality of circulation tubes arranged in two rows spaced apart. an arch supported on each row, and single spacer brick adapted to receive the thrust of both arches.

in testimony whereof, I have hereunto signed my name.

LE GRAND PARISH. 

